to make a dent

The entrances to caves are generally insignificant and unattracting. For the most part, no doubt, they have no entrance.

Unless the head is driven out of the bowel it will continue to produce new segments[…]The stools passed after administration of the taenifuge should be carefully examined with a view to discover the head of the worm.

with an incredible courage they advanced to the push of the Pike with the defendants, that with the like courage repulsed […], that the Turks retired and fled into the Castle, from whence by a flag of truce they desired composition.